Make Power Infusion a Self Buff Only

Not currently, maybe.

But imagine if other classes could do things like that?
Maybe a Shaman could give someone a Windfury Infusion of sorts? Pop it on a Warrior or Rogue and let em just wreck things.
Maybe a Druid could give someone a Thorns style buff, but with some actual teeth to it. Suddenly the tank holding 4 or 5 adds is reflecting back big damage.

If the game had a multitude of temporary combat buffs PI wouldn’t be this huge outlier.
Also, logs have been getting padded and gamed for years based on everything I’ve seen and read about them.
How many players actually care about logs outside of high-end raiders?